Editing Delta wave (section)

===Schizophrenia===

People with schizophrenia have shown disrupted EEG patterns, and there is a close association of reduced delta waves during deep sleep and negative symptoms associated with schizophrenia. During slow wave sleep (stages 3 and 4), people with schizophrenia have been shown to have reduced delta wave activity, although delta waves have also been shown to be increased during waking hours in more severe forms of schizophrenia.<ref>Alfimova, M. V., & Uvarova, L. G. (2007). Changes in the EEG spectral power during perception of neutral and emotionally salient words in schizophrenic patients, their relatives and healthy individuals from general population. [Article]. Zhurnal Vysshei Nervnoi Deyatelnosti Imeni I P Pavlova, 57(4), 426-436.</ref>
A recent study has shown that the right frontal and central delta wave dominance, seen in healthy individuals, is absent in patients with schizophrenia. In addition, the negative correlation between delta wave activity and age is also not observed in those with schizophrenia.<ref>Sekimoto, M., et al., Cortical regional differences of delta waves during all-night sleep in schizophrenia, Schizophr. Res. (2010), {{doi|10.1016/j.schres.2010.11.003}}</ref>